ADM485
SPECIFICATIONS
V
CC
= 5 V ± 5%, all specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 1.
Parameter
DRIVER
Differential Output Voltage, V
OD
Min
Typ
Max
5.0
5.0
5.0
5.0
0.2
3
0.2
250
250
0.8
±1.0
−0.2
70
12
1
–0.8
0.8
2.0
±1
0.4
4.0
7
85
±1.0
1.0
0.6
2.2
1
+0.2
Unit
V
V
V
V
V
V
V
mA
mA
V
V
μA
V
mV
kΩ
mA
mA
V
V
μA
V
V
mA
μA
mA
mA
Test Conditions/Comments
R = ∞, see Figure 20
V
CC
= 5 V, R = 50 Ω (RS-422), see Figure 20
R = 27 Ω (RS-485), see Figure 20
V
TST
= −7 V to +12 V, see Figure 21
R = 27 Ω or 50 Ω, see Figure 20
R = 27 Ω or 50 Ω, see Figure 20
R = 27 Ω or 50 Ω
−7 V ≤ V
O
≤ +12 V
−7 V ≤ V
O
≤ +12 V
V
OD3
Δ|V
OD
| for Complementary Output States
Common-Mode Output Voltage, V
OC
Δ|V
OD
| for Complementary Output States
Output Short-Circuit Current, V
OUT
= High
Output Short-Circuit Current, V
OUT
= Low
CMOS Input Logic Threshold Low, V
INL
CMOS Input Logic Threshold High, V
INH
Logic Input Current (DE, DI)
RECEIVER
Differential Input Threshold Voltage, V
TH
Input Voltage Hysteresis, ΔV
TH
Input Resistance
Input Current (A, B)
CMOS Input Logic Threshold Low, V
INL
CMOS Input Logic Threshold High, V
INH
Logic Enable Input Current (RE)
CMOS Output Voltage Low, V
OL
CMOS Output Voltage High, V
OH
Short-Circuit Output Current
Three-State Output Leakage Current
POWER SUPPLY CURRENT
I
CC
, Outputs Enabled
I
CC
, Outputs Disabled
2.0
1.5
1.5
35
35
2.0
−7 V ≤ V
CM
≤ +12 V
V
CM
= 0 V
−7 V ≤ V
CM
≤ +12 V
V
IN
= 12 V
V
IN
= −7 V
I
OUT
= 4.0 mA
I
OUT
= −4.0 mA
V
OUT
= GND or V
CC
0.4 V ≤ V
OUT
≤ 2.4 V
Digital inputs = GND or V
CC
Digital inputs = GND or V
CC
Rev. F | Page 3 of 16
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